【简答题】设集合 ,集合 ,则 等于 A. B . C. . D.
【单选题】直齿圆柱齿轮通过轮齿顶部的圆的直径叫做( )。
【单选题】设集合 , ,则集合 等于 ( ▲ ) .
【简答题】直齿圆柱齿轮通过轮齿根部的圆的直径叫做( )。A. 4
【单选题】▲据广西现行消耗量定额的规定,以下关于入岩增加费的说法错误的是( )。
【简答题】设集合 , ,则 等于 A. B. C. D.
【单选题】So far as the broadcasting hours devoted to entertainment are concerned, ______.
A.
the Japanese figure is the highest in the world
B.
the U. S. figure is smaller than the U. K. figure
C.
the U. K. figure is second to the Japanese figure
D.
the Canadian figure is higher than that of any other country